The National Weather Service in Grand Forks has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 9 PM CDT this evening. * AFFECTED AREA...In Minnesota, West Polk, Norman, Clay, West Marshall, Wilkin, West Otter Tail and Grant. In North Dakota, Cavalier, Pembina, Eastern Walsh, Grand Forks, Steele, Traill and Western Walsh. * WINDS...Northwest 25 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 29 percent. * IMPACTS...Any fi